Sawtooth Traverse

The biggest caveat here is a data mismatch: the stream gauges in this briefing are from central California watersheds — Salinas River, Llagas Creek, Alameda Creek near Sunol — none of which are anywhere near the Sawtooth Range in central Idaho. Treat stream crossing data as completely unavailable for this trip. November in the Sawtooths means you're likely dealing with early-season snow crossings, partially frozen streams, and ice on shaded trail sections. Check Idaho Department of Water Resources or the Boise NF ranger district for any local gauge data before you leave, and probe crossings carefully — late-season low flows are more likely than dangerous high flows at this time of year, but ice at crossings is a real foot hazard.

Weather is the bright spot. Highs of 50°F Tuesday and Wednesday with light winds (under 5 mph) and mostly sunny skies give you a clean two-day window to cover ground. Nights will drop to 31-32°F, which is cold but manageable — expect frozen tent fabric and icy trail surfaces at elevation each morning, especially on north-facing sections. Thursday brings a chance of rain and snow showers (28% precip, high of 43°F), which is the one day you don't want to be exposed on a high ridgeline. If your itinerary has you on the upper traverse Thursday, consider pushing that section to Wednesday and dropping to a lower camp before the precip moves in.

With no SNOTEL stations within 50 km and no avalanche forecast zone assigned, snowpack is a genuine unknown. Early November in the Sawtooths can range from bare talus to a foot or more of new snow above 9,000 ft depending on October's storm history. That 31-32°F overnight low means any existing snow will be firm and icy in the morning hours — microspikes are not optional if you're on exposed ridges or north-facing slopes. By early afternoon the surface may soften slightly with solar heating, which is your best window for traction on technical terrain.

Daylight is tight at just over 10 hours — you lose the sun at 5:29 PM. Start moving by 7:30 AM each day to maximize your window. On Thursday with the incoming weather, earlier is better. No fire smoke concerns, no complex weather systems — this is a straightforward late-season alpine trip with the usual November caveats around cold nights and unknown snow.